Grinding, crushing, and mixing mill



J. WASS June 21, 1 932.

GRINDING, CRUSHING, AND MIXING MILL h Filed March 21. 1930 5Sheets-Sheet 1 14 T TOE'EX J. WASS June 21, 1932.

GRINDING, CRUSHING, AND MIXING MILL s Shets-Sheet 2 Filed March 21. 1930J. wAss June 21, 1932.

GRINDING, CRUSHING, AND MIXING MILL 6 Sheets-Sheet 3 Filed March 21.1950 Patented June 21, 1932 PATENT OFFICE J'OSEIHUS WASS, KETTERING,ENGLAND GRINDING, cnusnme, Ann MIXING MILL Application filed March 21,1930, Serial No;

This invention relates to grinding, crushing and mixing mills and hasreference more particularly to those of the edge. runner type, theobject of the invention being to improve such machines generally, and toprovide a machine which can'be employed as a mixer without using theroller or rollers, as will be hereinafter described.

The invention is mainly concerned with 16 machines of the type aforesaidwherein one or more rollers having conical or similar peripheralsurfaces cooperate with a correspondingly slopin portion of a pan.

In further descri ing the invention reference will be, made to theaccompanying drawings, wherein specific examples of the variousimprovements constituting the invention are illustrated.

In the drawings V Figurel is a plan view of a crushing and mixing millembodying several improvements according to this invention.

Figure Qis a part sectional side elevation thereof.

Figure 3 is a sectional detail taken on line III-III of Figure 2, and

Figure 4 is a further detail viewed in the direction of the arrow A inFigure 1.

Figure 5 is a plan view, and I Figure 6 a part sectional side elevationof of a modified form of the invention.

Figure 7 is a plan view, and t Figure 8 a side elevation of a furthermodification hereinafter referred to.

According to the invention I provide a mill of the aforesaid edge runnertype wherein the roller 1 or rollers is or are carried by a support orsupports movablebymechanical means for raising and holding the roller 40or rollers from the bottom of the pan 2 so as to accommodate largerbatches of material or to enable the mill to be used simply for mixingmaterials i. e. without subjecting the latter to the grinding androlling action of the roller or rollers.

The invention also includes the provision of an adjustable springattachment in association with the roller support or' supports, wherebythe pressure exerted by the roller or rollers for milling can be variedto readily understood.

the material collected by the latter can be de- 437,73s, and in GreatIliritain July 6, 1929.

suit different requirements. By means of this arrangement the roller orrollerscan be adjusted so as to thoroughly mill the desired material e.g. sand for foundryuse, without over-milling or excessively crushingsame. There are also provided, according to the invention, deflectors ofimproved construction and arrangement for thoroughly mixing the materialand effecting the discharge of the mixture over the edge of the pan whenrequired. These deflectors comprise inner and outer deflectors servingas mixers, a deflector which is movable into and out of the pan forcontrolling the discharge of the mixed material and another movabledeflector which is used when mixing only and no grinding is required,and when the mill is discharging mixed material. In this connection afeature of the invention is that the jouterdeflector comprises at leasttwo sections adj ustably connected so that the front section can beadjusted, as wear takes place, to present a different part thereof tothe material; It is found that the wear takes place atone particularpoint at the front end of, the outer deflector and thus when a one-piecedeflector is employed this soon becomes useless. By pro- V viding theadjustable section the life of the deflector is considerably prolongedaswill be To assist further the discharge of the mix- I ture from thepan, the latter may be arranged so as to be capable of being tilted ortipped during the rotation thereof.

The invent-ion also includes the provision of a scraper for the edge ofthe pan whereby the latter can be kept clean. A. small shoot may becombined with this scraper so that posited in a heap on the flooradjacent to the 99 mill or in a suitable receptacle.

Conveniently the scraper is held in contact with the edge of the pan bymeans of a spring. Alternatively a screw adjustment may be provide'd'forsetting the scraper in the required position.

I The mill may be mounted on road wheels so as to be movable from placeto place, or it may be a fixture. When mounted'on road 100 illustratedH1 Figures 1 to 1, the aforesaidroller 1 is mounted on a stub axle? orequivalent at one end of an arm or like carrier 4 which,,at the otherend, is pivotally mounted on a pin 5 carried by the frame 6 of the millso as to extend horizontally and diametrically above the pan 2. The saidarm or carrier is acted on from above by a compression spring"?encircling the pan spindle 2a, which latter passes through a slot 4a inthe cam or carrier, the pressure exerted by said. spring, andconsequently that exertedby the roller on the material in the pan, beingvaried in accordance with requirements. by means of a plate 7a andadjusting screws 8 carried in the frame. For lifting the roller so. asto enable the mill to be used simply as a mixer, or to accommodatelarger batches of material, there is provided a U-shaped or equivalentmember 9 (see particularly Figure 3) which embraces the aforesaid arm orcarrier 4 and is adjustably carried by a nut device 10 movable by ascrew 11 mounted on the aforesaid frame adjacent to the springattachment, e. g. he-

tween the latter and the roller. The screw 11 is preferably mounted onthe framein a resilient manner, and for this purpose carries on itslower'end a collar or bush 11a adapted to slide vertically in abearingllh on the frame against the action of a springillc, the latteracting as a cushion for the roller as it passes over rough material inthe pan. The arrangement is such that upon rotation ofthe screw 11 inone direction the U-shaped member is moved vertically and consequentlyraises the pivotedarm and the roller against the action of the spring 7.It will be understood that when the roller is in the operative positionthe U-shaped member is adjusted so as to have the arm unsupportedtherebyso that the roller is fully subjected to the pressure exerted by thespring. 7

A curved inner deflector 12 is mounted within the pan, so as to extendin spiral fashion from the hub thereof, for the purpose of deflectingthe material on to the sloping portion of the pan and under the rollerfor milling. This inner deflector together with an outer deflector13'also serves to thoroughly mix the material in the pan. Theouterdeflector which is attached to the frameand curved so as to extendpartly round and inwards towards the centre of the pan, has a detachablefront end piece 1 1 (see Figure 4) which is secured to the remainder bymeans of nuts 15 and bolts 16 which latter are passed through curvedslots 17 in either the end piece or the part to which it is secured sothat said piece can be adjusted to present fresh portions thereof to thematerial when wear takes place as hereinbefore mentioned. Anothercurveddeflector 18, which in effect forms a continuation of'the innerdeflector 12 when in the operative position, is detachably secured to ahand lever 19 fulcrumed at 20 on the frame so as to extend across thepan with the-deflector located between the free end of the lever and thefulcrum. By meansof the lever this deflector can be moved into and outof the operative position, in which latter position. it is placed whenmixing only and no grinding is required, and when the mill isdischarging after grinding or mixing. The hand lever 19 is locatedwithin a bracket 21, a notch or recess 21a being provided therein forholding the deflector in the raised position. The aforesaid deflector 18is located between the inner deflector 12 and another movabledischarging deflector 22 which is also attached to a hand lever 23fulcrumed at 2 1 on the frame so as to enable it to be lifted out of thepan when the mill is mixing or grinding and lowered when the material isto be discharged.

Means of any suitable form, such as a bracket 25, are provided forholding this deflector in the raised position. It will be understoodthat the lower edges of the movable deflectors are shaped to suit thepan.

The edge scraper hereinbefore referred to conveniently consistsof apivoted member 26 mountedon abracket 27 attached to the frame and pulledinto contact with the edge of the pan by a tension spring 28. scrapermay be shaped so that the material collected thereby is cleared off theedge of the pan anddeposited in a heap near the pan or inaconvenient'receptacle'for further use.

A small shoot (not shown) may be combined 7 with the scraper to directthe said material to the requiredpoint.

The rotary pan is furnished with a bevel wheel or ring 29 driven by abevel pinion 30 on a belt or other power driven shaft 31, and

the pan spindle 2a: is carried at the top and bottom in suitableball-bearings 32 and 33 carried by the top and bottom frame membersrespectively.

When both of the movable deflectors are lowered these and the innerdeflector are disposed end to' end so that in'effect a continuousdeflector is formed and the material is discharged at one definitepoint, the mill being practically self-delivering.

material from the pan, we may mount the latter so as to be capable, ofbeing tipped with the frame. An arrangement of this This In order toassist in the discharge of the character is illustrated in F igures 5and 6 wherein the frame 6a is mounted on two short 1 spindles 34 and 35by means of brackets 36. said frame and is movable for raising the Thesaid spindles are carried in bearings 37 roller from the bottom of thepan, for the the spindle 34 being power driven and furpurpose described.

nished on its inner end with a bevel pinion 30a for driving engagementwith a gear wheel or ring 2964 on or carried by the pan 2?). The pan iscarried in the frame as above described, the arrangement being such thatfor discharging purposes, in addition to the movable dischargingdeflector 22a, the whole frame and pan may be turned about the axes ofthe spindles 34 and To assist in the tilting movement of the frame, thelatter is furnished on opposite sides with handles 38 and 39. Further,in this arrangement, I prefer to make the pan deeper as illustrated soas to accommodate a bigger charge of material.

It will be understood from the drawings that both the above describedarrangements are intended as fixtures, mainly for indoor requirements. Imay, however, mount the mill upon road wheels, and an arrangement ofthis kind is shown in Figures 7 and 8.

In this arrangement the pan is rotated by a worm wheel 40 mounted on theupper end of the pan spindle, said wheel being engaged by a worm ll on apower driven shaft 42 in bearings 43 carried .by the top members of theframe. The mill may be arranged as a composite unit, in which case anelectric m0- tor 44k or the like may be carried by the frame and coupledto the shaft 42. It will be understood that the pan and frame may betilted about the road wheels 45 to assist in the discharge of thematerial.

The various improvements hereinbefore described increase the utility andefficiency of a mill of the type concerned, and consequently output isincreased and better results and greater economy are achieved.

It is to be understood that, although specific terms are employed in theforegoing description, they are used in a generic and descriptive senseand not for purposes of limitation, the scope of the invention being setforth in the following claim.

What I claim then is A grinding, crushing and mixing mill of the typereferred to, which includes a pan for the reception of the material tobe treated, a scraper for the edge of the pan whereby the latter can bekept clean, a frame in which the pan is rotatably mounted, means forrotating the pan in the frame, deflectors in the pan for mixing thematerial and efiecting the discharge of the mixture over the edge of thepan when required, supports for said frame in which the latter ispivotally mounted so as to be capable of being tilted when required toassist the discharge of the mixture from the pan, a roller forco-operation with the pan for treating the material, and a support forsaid roller which is pivotally mounted in In testimony whereof I afiixno signature;

J OSEPHU WASS. 7G

